Biology, 18.10.2019 04:30 montgomerykarloxc24x
An organism's development from an embryo may contain clues about its history that scientists can use to develop relationships and build evolutionary trees. ancestral characters are often preserved in an organism's developmental stages. for example, both bird and human embryos go through a stage where they have slits and arches in their necks like the gill slits and gill arches of fish. these structures are not gills and do not develop into gills in birds and humans, but because they are so similar to gill structures in fish at this point in development scientists believe that
a) birds and humans evolved from fish.
b) all vertebrate animals have identical embryos.
c) fish, birds, and humans share a common ancestor.
d) fish evolved as a life form long before birds or humans.
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Biology, 21.06.2019 22:00
In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .
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Biology, 22.06.2019 08:20
In which way are mercury and venus similar? they both rotate from east to west. they are both small and rocky. they both have thick atmospheres. they both are similar to earth in structure.
Answers: 3
An organism's development from an embryo may contain clues about its history that scientists can use...
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